<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>2_回调函数的ref</title>
    <style>
        .title{color:red}
    </style>
</head>
<body>
    <!-- 准备好一个容器 -->
    <div id="test"></div>


    <!-- 引入react核心库 -->
    <script src="../js/16/react.development.js" ></script>
    <!-- 引入react-dom，用于支持react操作DOM -->
    <script src="../js/16/react-dom.development.js"></script>
    <!-- 引入babel，用于将jsx转为js -->
    <script src="../js/babel.js" ></script>
    <script type="text/babel"> /*此处一定要写babel，否则无法识别jsx语法*/
        // 创建类式组件
        class Demo extends React.Component{
            showData = () => {
                alert(this.input1.value)
            }
            render(){
                return (
                    <div>
                        <input ref={c => this.input1 = c} type="text" placeholder="点击按钮提示数据" />
                        <button onClick={this.showData}>点击提示右侧数据</button>
                    </div>
                )
            }
        }
        // 通过展开运算符批量传递属性
        ReactDOM.render(<Demo/>, document.getElementById('test'))
    </script>
</body>
</html>